auer HRC70 - HRC 70 Heat Pump:230 V Single Phase Connection; HRC 70 Heat Pump: 400 V Three-Phase Connection; Electrical Protection for the Compressors

- INSTALLER 7 & 11kW HRC
70
HIGH TEMPERATURE HEAT PUMP MANUAL -
23
3.5.3.2 -HRC
70
Heat Pump: 400V three-phase
connection
L1,L2,L3 = phase
N = neutre
PE = terre
• Three-phase monitor relay for the HRC
70
Heat Pump
(17kW and 25kW)
A phase monitor relay is installed to prevent a phase failure,
which could damage the compressors. If the phases are
reversed, it will stop the power supply to the Heat Pump.
If the phase order is reversed or there is a phase missing, the relay
cuts the power supply to the circuit board. A «BUS ERR» error
message will appear. This is indicated on the phase monitor relay
by the orange light at the top being o and the green light at the
bottom being on. To correct the error, reverse the two phases on
the mains power terminal.
When the Pilot is switched on, a ‘‘BUS ERR’’ error message will
be displayed. Reverse the two phases on the three-phase power
cable of the Heat Pump. Switch the power back on and check the
voltage on each phase.
In case of INCORRECT WIRING:
Warning: never work with live voltage!
CABLAGE CORRECT
CABLAGE INCORRECT
3.5.3.1 -HRC
70
Heat Pump:230V single phase
connection
L = phase
N = neutral
PE = ground
Thermal magnetic fuse
or circuit-breaker
see §
"Recommendations
for connecting to
power supply"
Thermal magnetic fuse
or circuit-breaker
3-wire section to be de ned:
see § "Recommendations for
connecting to power supply"
L1,L2,L3
= p
h
as
e
N = n
eu
tr
e
PE = t
e
rr
e
L = phase
N = neutral
PE = ground
CORRECT WIRING INCORRECT WIRING
green light
only on
green and
orange lights
on
3.5.4 - Electrical protection for the compressors
The HRC
70
Heat Pump is equipped with a soft starter to limit the
intensity of the current when the motor starts up, in compliance
with the limits set by the NF C 15 100 standard (45A per phase for
single phase).
The electrical protection devices for the
compressors constantly monitor the
current and voltage. In case of over voltage,
under voltage or an abnormally high current,
the compressor will be stopped.
• Soft starter for the HRC7
0
Heat Pump when using a
single phase system
The soft start-up device constantly
monitors the compressor by
measuring the current and voltage.
In case of over voltage, under
voltage or an abnormally high
current, the compressor will be
stopped.
How it works:
• The soft starter controls the start-up phase until the motor
reaches its stable operating speed.
• If the motor cannot start, it is because the power supply has
been cut o by the soft start-up device.
In order to protect the compressor, the motor will not be able
to start up again until 5 minutes after it has been stopped.
Start-up errors:
• If the compressor fails to start up, two lights (green and red)
will  ash to indicate that there is an error (see § "Compressor
start-up errors".